Environment-friendly collection purification system for sewage/wastewater on bridge surface of river-crossing bridge

The invention discloses an environment-friendly collection purification system for sewage/wastewater on the bridge surface of a river-crossing bridge. The system includes a collection subsystem and apurification subsystem, and the collection subsystem includes an obliquely intersected open-type flow guiding groove, a U-shaped drainage groove and a water discharge pipe; the obliquely intersected open-type flow guiding groove is formed in the bridge surface of the bridge, the arrangement direction of the flow guiding groove is obliquely intersected with the longitudinal direction of the bridge,the U-shaped drainage groove is formed below a water outlet of the obliquely intersected open-type flow guiding groove, and the upper end of the water discharge pipe is communicated with the end of the U-shaped drainage groove. The purification subsystem includes an adjustment settling pond, an aeration grit chamber, a medicament storage pond, a dangerous medicine temporary storage pond, a settling silt temporary storage